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Finding the Fourth Proportional to 117,879.20, 176,703.60 and 105,437.60

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Solution

The fourth proportional to 117,879.20, 176,703.60 and 105,437.60 is: 158,053.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,879.20 : 176,703.60 = 105,437.60 : x
  2. Step 2: Convert to fraction form
    117,879.20/176,703.60 = 105,437.60/x
  3. Step 3: Cross multiply
    117,879.20x = 176,703.60 × 105,437.60
  4. Step 4: Simplify right side
    117,879.20x = 18,631,203,495.36
  5. Step 5: Solve for x
    x = 18,631,203,495.36/117,879.20
  6. Step 6: Final answer
    x = 158,053.36

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.